Karnataka SSLC Answer Key April 2019 Automobile

B
CCE RF
CCE RR
Revised & Unrevised

NSQF LEVEL-2
KARNATAKA SECONDARY EDUCATION EXAMINATION BOARD, MALLESWARAM,
BANGALORE – 560 003
NSQF LEVEL-2 EXAMINATION, MARCH/APRIL, 2019
MODEL ANSWERS
Date : 04. 04. 2019 ] CODE NO. : 88-EK
Subject : Automobile
( Regular Fresh & Regular Repeater )

[ Max. Marks : 60

Qn.
Value Points Total
I. Four alternatives are given for each of the following
questions / incomplete statements. Choose the correct
alternative and write the complete answer along with its
question number and alphabet : 10 × 1 = 10
1. The actual power delivered at the crankshaft is
(A) brake horsepower
(B) indicated horsepower
(C) friction housepower
(D) horsepower
Ans : A — brake horsepower 1
2. Resistance of the lubricating oil to flow is
(A) resistance against corrosion
(B) physical stability
(C) flash point
(D) viscosity
Ans : D — viscosity 1

RF & RR (B) - 403 [ Turn over

88-EK (Level-2) 2 CCE RF & RR
Qn.
Value Points Total

3. The initial curvature provided in a leaf spring is called
(A) dipping
(B) yawing
(C) pitching
(D) spring camber
Ans : D — spring camber 1
4. 6 × 2 drive chassis vehicle means
(A) consists of 6 wheels out of which 6 wheels are the
driving wheels
(B) consists of 6 wheels out of which 2 wheels are the
driving wheels
(C) consists of 12 wheels out of which 6 wheels are driving
wheels
(D) consists of 2 wheels out of which 2 wheels are driving
wheels.
Ans : B — consists of 6 wheels out of which 2 wheels are
the driving wheels 1
5. A stub axle is used for
(A) tightening the bolt (B) opening the nut
(C) rotating wheel (D) folding the nut
Ans : C — rotating wheel 1
6. The colour of the fog lamp is
(A) amber (B) green
(C) red (D) white
Ans : A — amber 1
7. Mallet is made of
(A) iron (B) wood
(C) steel (D) aluminium
Ans : B — wood 1
8. Thermal imaging cameras are used in the following
innovations of car safety technology
(A) Night vision assist (B) Sensitive air bag system
(C) Blind spot detection (D) Rollover prevention
Ans : A — Night vision assist 1

RF & RR (B) - 403

CCE RF & RR 3 88-EK (Level-2)

Qn.
Value Points Total

9. Change of air filter is generally recommended when a vehicle
travels a distance of

(A) 50,000 km

(B) 60,000 km

(C) 30,000 km

(D) 20,000 km

Ans : A — 50,000 km 1

10. The material(s)/tool which is/are NOT used for changing the
engine oil and oil filter is/are

(A) engine oil (B) paper, towel and a rag

(C) carjack and stand (D) coolant

Ans : D — coolant 1

II. Fill in the blanks with suitable answer : 4×1=4

11. The instrument used to measure the specific gravity is
……………….. .

Ans : Hydrometer 1

12. The brake is a ……………. creating device which causes
speed reduction of the vehicle.

Ans : friction 1

13. The tubeless and tube tyres are called ……………. tyres.

Ans : Pneumatic 1

14. The first company to introduce passive keyless entry system
in vehicle is ……………….. .

Ans : chevys 1

RF & RR (B) - 403 [ Turn over

88-EK (Level-2) 4 CCE RF & RR
Qn.
Value Points Total

III. Automobile service tools are given in Column-A and their
uses are given in Column-B. Match them : 4×1=4

15. Match the following :
Column-A Column-B
i) Chisel a) removes sharp edges
ii) Snips b) for lubrication
iii) Punch c) cuts metals
iv) File d) cuts sheet metals
e) for softer blows
f) holds small object
g) drives objects.

i) c) — cuts metals 1
ii) d) — cuts sheet metals 1
iii) g) — drives objects 1
iv) a) — removes sharp edges. 1 4
IV. Answer the following questions : 6×1=6

16. Classify the lubricants on the basis of their state.
i) Solid lubricants
ii) liquid lubricants ½
iii) semi-solid lubricants ( Any two ) ½ 1

17. Write the functions of an alternator.
i) it produces alternating current when the engine is
running
ii) converts alternating current into direct current
iii) it is the source of electricity in automobile when the
engine is running
½
iv) when the engine is running alternator charges the
battery. ( Any two ) ½ 1

RF & RR (B) - 403

CCE RF & RR 5 88-EK (Level-2)

Qn.
Value Points Total

18. Ball-peen hammer is called an engineer’s hammer. Why ?

The hammers made of hardened steel used for working with
steel components 1

19. Mention the uses of grinding machine.
i) Finish the work pieces ½
ii) Sharpen the tools
iii) To produce high accuracy of shape and dimension. ½
( Any two ) 1

20. Mention the uses of the following electrical tools :
i) Tachometer
ii) Multimeter.
i) Measures the working speed of the engine ½
ii) Measures voltage, current and resistance. ½ 1

21. Changing of engine oil is important. Why ?

Oil is important material in a vehicle, incorrect oil level
causes serious damage to the vehicle engine. 1

V. Answer the following questions : 6 × 2 = 12
22. Explain the following technical terms used in engine :
a) Top dead centre
b) Stroke.
a) Refers to position of the crank shaft when the piston is
in its top most position is in its top most position. The
position closest to the cylinder head. 1
b) Distance travelled by the piston moving from T.D.C. to
B.D.C. 1 2

OR

RF & RR (B) - 403 [ Turn over

88-EK (Level-2) 6 CCE RF & RR
Qn.
Value Points Total

Explain the following technical terms used in engine :
a) Compression ratio
b) Clearance volume.
a) Indicates the extent to which the charge of the engine
is compressed, ratio of volume above the piston at
B.D.C. 1

b) The volume of cylinder above the piston when it is in
the T.D.C. 1 2
23. Write a short note on liquid cooling.
Sometimes instead of water other liquids having higher
boiling points are used for engine cooling higher boiling
point increases the capacity of the liquid to carry heat and
consequently weight of the coolant and hence that the
radiator is decreased. 2
OR
Write a short note on pressure sealed cooling.
The boiling point of water is raised at higher pressures with
consequent reduction in coolant and the radiator weights
and greater thermal efficiency of the engine due to higher
operating temparetures. To achieve this special pressure a
sealed radiator cap is used. 2
24. Draw the diagram of channel section frame and box section
frame.

1

1
2

RF & RR (B) - 403

CCE RF & RR 7 88-EK (Level-2)

Qn.
Value Points Total

25. Write precautions to be taken during washing a vehicle.
i) Wear old clothes for the job
ii) Soap dries fast wash one side at a time to keep the
½
soap from drying on your car’s print
½
iii) Wet and rinsing out your clothes before you dry
½
iv) Do not use detergent, use car wash soap only. ½ 2
26. List the important aspects of customer service.

i) Know your product
1
ii) Body language/communication

iii) Anticipate guest needs. ( Any two ) 1 2
27. Explain blind spot detection.
Now there is a system for alerting us, if we attempt to make
a turn and an object OR car is in our blind spot. This
technology responds as soon as the driver puts on the turn
signal thereby preventing a collision caused by the drivers
blind spot. 2

VI. Answer the following questions : 4 × 3 = 12

28. Differentiate between universal clutch holding tool and
flywheel puller.
The universal clutch holding tool is a special tool. Used for
holding the compressor clutch when removing or installing
the center nut. 1½

Fly wheel puller is a special tool. A proper fly wheel puller is
the only correct and safe way to remove fly wheel from
engine without using the recommended tool there are
chances of damaging the fly wheel which could lead to a
potential reliability issue. 1½ 3

OR

RF & RR (B) - 403 [ Turn over

88-EK (Level-2) 8 CCE RF & RR
Qn.
Value Points Total

Differentiate between outside calipers and inside calipers.
Outside calipers :
i) it is a two legged steel instrument with it legs bent
in wards ½
ii) used for measuring or comparing the thickness,
diameters and other outside dimensons
½
iii) steel rule must be used in conjunction with them if
direct reading is required. ( Any two )
½
iv) specified by the greatest distance it can be opened at
the tips of the legs
Inside calipers :
i) similar to outside caliper leg bent outward ½
ii) this is used for compairing or measuring hole
diameters, distance between shoulders or other parallel ½
surfaces of any inside dimension
iii) to obtain a specific reading steel rule must be used. ½ 3
29. How to prepare your car for changing the engine oil ?
i) car should be parked on level surface
ii) parking brake on ½
iii) engine off ½
iv) leaving the oil to cool for few minutes ½
v) jack it up and use jack stand to support ½
vi) put something underneath the engine to prevent ½
spilling oil on to the grand. ½ 3
30. Explain the functions of air filter.
Vehicle needs air just as much as it needs fuel. The main
function of the air filter is to keep the engine free of dust
and insects. Replacing or cleaning air filter at the
recommended interval to keep the air flowing freely, helps
the vehicle run well. Air filters are in expensive and quick to
replace, so we can do this routine maintenance ourselves. 3

RF & RR (B) - 403

CCE RF & RR 9 88-EK (Level-2)

Qn.
Value Points Total

31. List any six duties performed by the automobile sales
person.
i) Sells/leases and delivers a minimum number of vehicle
per month (target given by shopowner )
ii) Approaches, greets and offer assistance
iii) Assist customer in selecting a vehicle
iv) explains fully the product performance, application and
benefits
v) offers test drives to all prospects ½
vi) utilizes dealership sales control and follow up system ½
vii) schedules first service appointment ½
viii) Attend sales meeting ½
ix) Maintains a well groomed and professional appearance ½
and other relevant answers. ( Any six ) ½ 3
VII. Answer the following questions : 3 × 4 = 12

32. Explain the following automobile service workshop
equipment :
a) Reciprocating air compressor
b) Wheel balancer.
Reciprocating air compressors : Designed for heavy shop or
industrial use ingersoll rand two stage electric air
compressors provide the quality and performance that are
ideal for most applications and users including automotive
service and body shops fleet maintenance. Machine shops
production and manufacturing lines, car washes,
maintenance and repair shops and farms.
2
Wheel balancer : Wheel balancing helps in minimizing tyre
vibrations and bounce by wheel balancing tractions.
Steering control improves and life of tyres increases.
Automatic wheel balancer is designed for the tyre shop and
workshop, it is very simple and easy to operate.
2 4
OR

RF & RR (B) - 403 [ Turn over

88-EK (Level-2) 10 CCE RF & RR
Qn.
Value Points Total
Suggest the tips while handling and maintaining general
tools.
i) Should properly handled
ii) Proper Procedure should be adopted 1
iii) Kept in proper place after use
iv) wornout tools should be replace with new tools 1
v) Kept in tool box or display board
vi) proper safety procedure should be adopted 1
vii) Proper dress should be wear by trainees during work
shop practical. ( Any four ) 1 4
33. Draw the diagram of battery case and label the parts.

Sketch 3
Parts 1 4
OR
Draw the diagram of Elliot type stub axle and label the
parts.

Sketch 2
Parts 2 4

RF & RR (B) - 403

CCE RF & RR 11 88-EK (Level-2)

Qn.
Value Points Total

34. What are the steps to be followed for changing the air filter ?
i) Obtain the correct replacement filter ½
ii) Secure the vehicle ½
iii) Open the bonnet
½
iv) Locate the air filter
v) Take out the air filter ½

vi) Clean up air filter housing ½
vii) Replace the filter
½
viii) Replace the cover
½
ix) Change the air filter every 50,000 km or about once a
year. ( Any eight ) ½ 4

RF & RR (B) - 403 [ Turn over